#include<bits/stdc++.h>
#define y1 Y1
#define fi first
#define endl "\n"
#define se second
#define PI acos(-1)
#define int long long
#define pb(x) push_back(x)
#define PII pair<int, int>
#define Yes cout << "Yes\n";
#define No cout << "No\n";
#define YES cout << "YES\n";
#define NO cout << "NO\n";
#define _for(i, a, b) for(int i = a; i <= b; ++i)
#define IOS ios::sync_with_stdio(false),cin.tie(0),cout.tie(0)
using namespace std;

const int N = 2e5 + 10;
int a[N];
int n, m;
string s;

signed main() {
	IOS;
	cin >> n >> m ;
	while(n -- ) {
		int y = 0;
		int o = 0;
		_for(i, 1, m) {
			int x;
			cin >> x;
			if(x == 1) {
				y++;
			} else {
				o++;
			}
		} 
		cout << abs(y - o) << endl;
	}

	return 0;
}

